content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * -----------------------
   * IntervalXYZDataset.java
   * -----------------------
   * (C) Copyright 2001-2008, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 31-Oct-2001 : Version 1 (DG);
   *
   */
  
  package org.jfree.data.xy;
  
  /**
   * An extension of the {@link XYZDataset} interface that allows a range of data
   * to be defined for any of the X values, the Y values, and the Z values.
   */
  public interface IntervalXYZDataset extends XYZDataset {
  
      /**
       * Returns the starting X value for the specified series and item.
       *
       * @param series  the series (zero-based index).
       * @param item  the item within a series (zero-based index).
       *
       * @return The starting X value for the specified series and item.
       */
      public Number getStartXValue(int series, int item);
  
      /**
       * Returns the ending X value for the specified series and item.
       *
       * @param series  the series (zero-based index).
       * @param item  the item within a series (zero-based index).
       *
       * @return The ending X value for the specified series and item.
       */
      public Number getEndXValue(int series, int item);
  
      /**
       * Returns the starting Y value for the specified series and item.
       *
       * @param series  the series (zero-based index).
       * @param item  the item within a series (zero-based index).
       *
       * @return The starting Y value for the specified series and item.
       */
      public Number getStartYValue(int series, int item);
  
      /**
       * Returns the ending Y value for the specified series and item.
       *
       * @param series  the series (zero-based index).
       * @param item  the item within a series (zero-based index).
       *
       * @return The ending Y value for the specified series and item.
       */
      public Number getEndYValue(int series, int item);
  
      /**
       * Returns the starting Z value for the specified series and item.
       *
       * @param series  the series (zero-based index).
       * @param item  the item within a series (zero-based index).
       *
       * @return The starting Z value for the specified series and item.
       */
      public Number getStartZValue(int series, int item);
  
      /**
       * Returns the ending Z value for the specified series and item.
       *
       * @param series  the series (zero-based index).
       * @param item  the item within a series (zero-based index).
       *
       * @return The ending Z value for the specified series and item.
       */
      public Number getEndZValue(int series, int item);
  
  }
  